Prototype Board Revisions

Rev4 - ESP32-01-20191206 (aka The Ice Cream Sandwich)

• Designed by: @mozzwald
• First ESP32 based PCB, Limited run of 10
• Fully integrated components; No Nodemcu needed
• External connectors:
  • SIO Plug & Receptacle
  • MicroUSB for Power and Programming (onboard CP2102 USB/UART bridge)
  • Micro slide switch for SIO Powered enable/disable
  • Micro SD Socket
  • Flash and Reset Buttons
  • Blue and Orange LED's (Blue wifi status, Orange SIO activity)

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Rev3 - Beta Test Board V3 (aka The Mars Bar / Chocolate Bar)

• Designed by: @a8bit
• SMD board
• Limited run of 10
• NodeMCU 1.0 sits on top
• Second iteration of surface mount SIO connector, much more chamfering
• Can work on either SIO or USB power
• Still in use
• Contains pass-through for connecting SIO cable.

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Rev2 - 2019-11-16

• Designed by: @mozzwald
• Limited run of 3 boards
• SMD Components
• NodeMCU 1.0 sits on top
• Added 2 pin serial debug port (GND, TX from GPIO2)
• Added slide switch for optional SIO power
• Added CLOCKIN (permanent) and CLOCKOUT (optional with solder jumper to GPIO2)
• DATAIN buffered with 2 NPN Transistors (thanks @jeffpiep)

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Rev1 - 2019-10-29

• Designed by: @mozzwald
• Limited run of 3 boards
• SMD Components
• NodeMCU 1.0 sits on top
• First iteration with surface mount SIO connector
• Case design never finished; shipped with 3D printed bracket to hold SIO connector
• USB Powered or optional SIO powered with solder jumper
• Heavy usage during initial test development
• Still in use

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Rev0 - Protoboard / Breadboard

• Designed by: @mozzwald
• Consisted of protoboard, wire-jumpered parts, SIO cable connected via header pins. * White tick indicates pin 1.
• NodeMCU 1.0 sits on top
• Cable prone to breakage
• While it wasn't explicitly designed to pull power from SIO, mine seemed to (Thom)
• It was designed to pull power from SIO (Mozz ;)
• Retired when I got Mozz's rev2.